servos twitter w/o tx...whats up?
Normal. It is just stray RF noise. Without the signal from the TX the receiver will demodulate any spurious local RF noise and the servos are trying to respond. The main reason for turning the transmitter on before the receiver is to prevent the servos from fully driving to one extreme in the absence of a signal. The same reason for turning the TX off last. Not that any damage is likely, it is mostly one of those better safe than sorry things.